Price Match
Now via Live Chat
Price Match
Now via Live Chat
Free Shipping
When you spend over £50
Free Shipping when you spend over £50
Easy Returns
Just call for a return number
Next Day Delivery
Need it fast?
This replacement glow plug relay is designed to control the pre-heating system on a wide range of Volkswagen TDI engines, including VW Transporter T4 2.5 TDI models and other vehicles equipped with the specified engine codes.
Fitted in the main relay panel (location 4/103 depending on model), this relay manages the glow plugs’ operation, ensuring reliable cold starts and correct post-start heating cycles. Over time, the original relay can fail internally, leading to difficult starting, poor cold running, or glow plug fault codes.
Fitment Details:
✅ VW Transporter T4: 2.5 TDI engines (ACV, AJT, AHY, AUF, AYY, AYC, AXG)
✅ VW Transporter T5: 2003–2006, 1.9–2.5 TDI engines
✅ VW Golf Mk3 & Mk3 Cabriolet: TDI models
✅ VW Golf Mk4 / Bora: TDI models (relay location 4/103)
✅ VW Vento: TDI models
✅ VW Polo Mk3 6N: TDI models
Specifications:
Relay marking: Relay 4/103 (also referenced as 12/103 on T4)
Direct-fit replacement for the original relay
Suitable for 12V glow plug systems
Features:
OE-style performance and fitment
Restores proper glow plug control for reliable starting
High-quality internal components for long service life
Fitting Notes:
Position: Main relay panel (refer to your vehicle’s relay diagram for exact location)
Always check wiring and glow plugs when replacing the relay
Clear any fault codes after installation
Applications:
VW Transporter T4: 2.5 TDI (ACV, AJT, AHY, AUF, AYY, AYC, AXG)
VW Transporter T5: 2003–2006 (1.9–2.5 TDI)
VW Golf Mk3 & Mk3 Cabriolet: TDI
VW Golf Mk4 / Bora: TDI
VW Polo Mk3 6N: TDI
VW Vento: TDI
Quantity: Sold each
Quality: Good quality reproduction
Manufacturer: JP
Availability: Stock Item
Unit of Measure: Each
Dimensions:
Width: 35mm
Height: 35mm
Depth: 60mm
Volume: 73500mm3
Weight: 0.037kg
This Part Fits: T4 Transporter, T5 Transporter, Mk3 Golf, Mk4 Golf, Bora, Mk3 Polo, Vento,